sampling with stratification

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• Sampling (statistics) — Sampling is that part of statistical practice concerned with the selection of individual observations intended to yield some knowledge about a population of concern, especially for the purposes of statistical inference. Each observation measures… …   Wikipedia

• Stratification — is the building up of layers, and can have several meanings *Social stratification, is the dividing of a society into levels based on wealth or power. *Stratification in archaeology is the formation of layers (strata) in which objects are found.… …   Wikipedia

• Stratification (mathematics) — Stratification has several usages in mathematics. In mathematical logic In mathematical logic, stratification is any consistent assignment of numbers to predicate symbols guaranteeing that a unique formal interpretationof a logical theory exists …   Wikipedia

• Stratified sampling — In statistics, stratified sampling is a method of sampling from a population.When sub populations vary considerably, it is advantageous to sample each subpopulation (stratum) independently. Stratification is the process of grouping members of the …   Wikipedia

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• Confounding — factor redirects here. For other uses, see Confounding factor (disambiguation). In statistics, a confounding variable (also confounding factor, lurking variable, a confound, or confounder) is an extraneous variable in a statistical model that… …   Wikipedia

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• List of sociology topics — This is a list of topics covered in sociology. This is a shorter list: List of basic sociology topics. NOTOC A absolute poverty achieved status acid rain acute disease adaptation Adultism affect control theory affirmative action affluent… …   Wikipedia

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